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The mean fluorescence intensity (MFI) of propidium iodide (PI) expressed on neutrophils in RSV bronchiolitis. The MFI of PI on neutrophils obtained from control peripheral blood (PB) (n = 9), RSV+ PB (n = 8), and from RSV+ nasopharyngeal aspirates (NPA) (n = 13) was detected by flow cytometric analysis. The values are expressed as mean ± s.e.m. *P < 0.05 compared with control PB group.
